Oxidation process
AssigneeSyngenta Participations AG
InventorsClive A. Henrick, Randall A. Scheuerman
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Abstract
Preparation of 2,5-dichlorophenol by selectively oxidizing 1,4-dichlorobenzene using a peroxo-, hydroperoxo-, superoxo- or alkylperoxo-metal species in the presence of an α-hydroxy-, dibasic-, tribasic- or sulfonic acid.
Claims32
A process for the preparation of 2,5-dichlorophenol which comprises selectively oxidizing 1,4-dichlorobenzene using a peroxo-, hydroperoxo-, superoxo- or alkylperoxo-metal species wherein said metal is selected from scandium, yttrium, lanthanum, titanium, zirconium, hafnium, selenium, tellurium, chromium, molybdenum, tungsten, manganese, rhenium, iron, ruthenium, osmium, cobalt, rhodium, iridium, nickel, palladium, platinum, copper, silver, zinc, aluminum, gallium, indium, tin, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and uranium or mixtures thereof in the presence of an acid selected from an α-hydroxy-, dibasic-, tribasic- or sulfonic acid or mixtures thereof.
A process for the preparation of 2,5-dichlorophenol which comprises selectively oxidizing 1,4-dichlorobenzene using a peroxo-, hydroperoxo-, superoxo- or alkylperoxo-metal species
- wherein said metal is selected from the group consisting of scandium, yttrium, lanthanum, titanium, zirconium, hafnium, selenium, tellurium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, rhenium, iron, ruthenium, osmium, cobalt, rhodium, indium, nickel, palladium, platinum, copper, silver, zinc, aluminum, gallium, indium, tin, cerium, praseodymium, neodymium, samarium, europium, godolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, uranium, and mixtures thereof,
- in the presence of a first acid selected from the group consisting of α-hydroxy-, dibasic-, tribasic acids and mixtures thereof.
Dependencies are inferred from the claim text.